JP7407795B2 - Liquid drug administration device and method for controlling the drug solution administration device - Google Patents

Description

The present invention relates to a liquid drug administration device and a method of controlling the drug solution administration device.

BACKGROUND ART In recent years, treatment methods have been used in which a drug solution is continuously administered into a patient's body, such as by subcutaneous injection or intravenous injection. For example, as a treatment for diabetic patients, a treatment in which a small amount of insulin is continuously administered into the patient's body is implemented. An example of a liquid medicine administration device used in this treatment method is one shown in Patent Document 1 below.

The drug solution administration device shown in Patent Document 1 below includes an injection section (injection disposable section) that includes an injection member (cannula) that injects a drug solution into a living body, and a liquid delivery member (liquid delivery disposable section) that delivers the drug solution to the injection member. a liquid sending section equipped with a liquid sending device that sends liquid to the liquid sending section and the liquid feeding reuse section), a detection section that detects connection and separation of the injection section and the liquid sending section, and a control section that controls the operation of the liquid sending device. has. The detection section includes a contact member provided on one surface of the housing of the injection disposable section and a switch provided on one surface of the connection section of the liquid feeding disposable section.

According to the liquid drug administration device having such a configuration, if the control unit restricts the dosing operation by the liquid feeder based on the result that the detection unit detects that the injection part and the liquid delivery part are in a connected state. , it is said that it can prevent unintentional administration of drug solutions into living organisms.

International Publication No. 2016/075976

However, in the liquid drug administration device as described above in which the injection part and the liquid delivery part are separably connected, even when these parts are connected, the cannula provided in the injection part and the liquid delivery part are connected. The connection between the liquid feeder and the liquid feed pipe is not always good. In addition, if the connection between the cannula and the liquid feeding tube is unstable after connection, there is a concern that the chemical solution may leak from these connections, and if the connection between the cannula and the liquid feeding tube is unstable, it may cause a problem in the connection between the cannula and the liquid feeding tube. This was a factor that inhibited administration.

Therefore, an object of the present invention is to provide a liquid drug administration device that can detect the connection state between a cannula and a liquid delivery tube, and to provide a control method for a liquid drug administration device that can perform highly accurate drug administration. shall be.

The liquid drug administration device of the present invention for achieving such an object relates to a liquid drug administration device that is used by attaching the device body to a cradle that adheres to the skin. The main body of the device houses a reservoir filled with a chemical liquid, a liquid feeding pipe extending from the reservoir, and a calculation unit that controls discharge of the chemical liquid from the reservoir. It has a fitting part that is exposed outside the housing. The cradle includes a cannula portion that is inserted under the skin, and a connection port that has a fitting end portion that connects to the fitting portion. The liquid medicine administration device further includes a connection detection device that detects connection between the fitting portion and the connection port.

According to the present invention, it is possible to provide a liquid drug administration device that is capable of detecting the connection state between a cannula and a liquid feeding tube, and to provide a control method for a liquid drug administration device that is capable of administering a drug solution with high precision. can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view for explaining the overall configuration of a liquid drug administration device according to a first embodiment. FIG. 2 is a plan view of main parts of the liquid medicine administration device of the first embodiment. FIG. 1 is a block diagram of a liquid medicine administration device according to a first embodiment. FIG. 2 is a perspective view of the device main body in the liquid medicine administration device of the first embodiment. FIG. 2 is a perspective view for explaining how the device body is attached to the cradle in the liquid medicine administration device of the first embodiment. FIG. 2 is a cross-sectional view (part 1) of a main part of the liquid medicine administration device of the first embodiment. FIG. 2 is a cross-sectional view (Part 2) of the essential parts of the liquid medicine administration device of the first embodiment. FIG. 2 is an enlarged cross-sectional view (part 1) illustrating a connection detection device provided in the liquid medicine administration device of the first embodiment. FIG. 2 is an enlarged cross-sectional view (Part 2) illustrating the connection detection device provided in the liquid medicine administration device of the first embodiment. It is a flowchart explaining the control method of the drug solution administration device of 1st Embodiment. FIG. 2 is a cross-sectional view (part 1) of a main part of the liquid medicine administration device of the second embodiment. FIG. 2 is a cross-sectional view (part 2) of a main part of the liquid medicine administration device of the second embodiment. FIG. 2 is a block diagram of a liquid drug administration device according to a second embodiment.

Hereinafter, each embodiment to which the present invention is applied will be described in detail based on the drawings. In addition, in each embodiment, the same components are given the same reference numerals, and overlapping explanations will be omitted.

≪First embodiment≫
<Configuration of drug solution administration device>
FIG. 1 is an exploded perspective view for explaining the overall configuration of a liquid drug administration device 1 according to the first embodiment. FIG. 2 is a plan view of main parts of the liquid medicine administration device 1 of the first embodiment. Moreover, FIG. 3 is a block diagram of the drug solution administration device 1 of the first embodiment. A drug solution administration device 1 shown in these figures is a device for continuously administering a drug solution into a patient's body. This liquid drug administration device 1 can administer insulin, analgesics, anticancer drugs, HIV drugs, iron chelating drugs, pulmonary hypertension drugs, and the like.

Such a liquid drug administration device 1 includes a device body 20, a cradle 30, an administration port 40 installed in the cradle 30, a connection detection device 50 provided in the device body 20 and the administration port 40, and a remote controller 60. Of these, the device main body 20 can be separated into a reusable section 20a and a disposable section 20b so as to be connectable. FIG. 2 corresponds to a plan view of the disposable section 20b, cradle 30, and administration port 40 of the device main body 20.

Hereinafter, based on these figures, the detailed configuration of the liquid drug administration device 1 will be explained in the order of the reusable section 20a and the disposable section 20b that constitute the device main body 20, the cradle 30, the administration port 40, the connection detection device 50, and the remote controller 60. explain.

Note that the device main body 20 is attached by sliding in the direction from the first end to the second end of the cradle 30. This direction (installation direction) is defined as a first direction X, and a direction that is perpendicular to the first direction Let it be Y (width direction). That is, the second direction Y is a direction that is substantially parallel to the living body surface when the drug solution administration device 1 administers the drug solution. The direction in which the device main body 20 and the cradle 30 overlap, that is, the direction perpendicular to both the first direction X and the second direction Y, is defined as a third direction Z (vertical direction). Here, the third direction Z is a direction perpendicular to the surface of the living body when the drug solution administration device 1 administers the drug solution. That is, the lower side of the third direction Z is the direction toward the living body surface.

[Reuse section 20a (apparatus main body 20)]
The reuse section 20a includes a lid 11, a circuit board 12, and a liquid feeding drive section 13. The reuse section 20a is a section where the electronic control functions of the device main body 20 are centrally arranged. The reuse section 20a is constructed by housing an electronic control function inside the lid 11 shown in FIG. A circuit board 12 and a liquid feeding drive unit 13 are housed inside the lid 11 . The circuit board 12 is provided with a main body output section 14, a main body communication section 15, and a main body calculation section 16. The liquid feeding drive section 13 includes a motor, a gear section, and the like. Further, the reuse section 20a is provided with a sensor 52 of a connection detection device 50, which will be described later, as an electronic control function.

-Lid body 11-
The lid body 11 is fitted with a housing 21 of a disposable section 20b to be described later, and the upper surface in the third direction Z becomes the top surface of the liquid medicine administration device 1. The main surface side (lower side in the third direction Z) of the housing 11 facing the disposable section 20b is configured to house the above-mentioned electronic control function. Here, the main surface refers to the connection surface between the reusable section 20a and the disposable section 20b.

-Circuit board 12-
The circuit board 12 is fixed within the lid 11, and connects the above-mentioned liquid feeding drive section 13, main body output section 14, main body communication section 15, main body calculation section 16, and sensor 52 to each other. Equipped with these. The circuit board 12 also includes a power supply section (not shown) for supplying power from a battery 23a disposed in a disposable section 20b, which will be described later, to each section via wiring.

-Liquid feeding drive unit 13-
The liquid feeding drive section 13 drives the pusher of the reservoir 22 provided in the disposable section 20b. The liquid feeding drive unit 13 is composed of a motor driven by, for example, a battery, and a plurality of gears that rotate in conjunction with the drive of the motor. Note that the liquid feeding drive unit 13 is not limited to these configurations, and may be any structure as long as it has a mechanism for discharging the chemical liquid from the reservoir 22.

-Main body output section 14-
The main body output unit 14 outputs an alarm W. The alarm W output by the main body output section 14 may be one that emits vibration or sound alone or in combination, and may also be one that emits light.

-Main body communication section 15-
The main body communication unit 15 is a part that performs wireless communication with the paired remote controller 60. The main body communication section 15 has a transmitting section and a receiving section, and is a section that performs wireless communication using radio waves in a predetermined wavelength band, and particularly performs wireless communication using extremely high frequency waves or microwaves.

Here, it is assumed that the main body communication unit 15 performs wireless communication with a communication distance of approximately 100 m. Specifically, ZigBee (IEEE802.15.4: frequency 2.4GHz), Bluetooth (registered trademark: IEEE802.15.1: frequency 2.4GHz), and wireless LAN (IEEE802.11a/b/g: frequency 2.4GHz). Standardized wireless communication technologies such as 4GHz, 5GHz) are applied.

-Main unit calculation section 16-
The main body calculation unit 16 discharges the medicinal solution from the reservoir 22 by controlling the operation of the liquid feeding drive unit 13 based on the signal transmitted from the paired remote controller 60 and the signal acquired by the sensor 52. control. Further, the main body calculation section 16 controls the operations of the main body output section 14 and the main body communication section 15. The main body calculation unit 16 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory), which are not shown here. The control of drug solution administration performed by the main body calculation unit 16 will be described in detail in the subsequent method for controlling the drug solution administration device.

[Disposable unit 20b (apparatus main body 20)]
The disposable section 20b includes a housing 21, a reservoir 22 housed inside the housing 21, and a battery box 23. The upper surface (principal surface side) of the housing 21 is covered by the lid 11 of the reuse section 20a.

-Case 21-
The housing 21 is a rectangular parallelepiped that is approximately rectangular when viewed from above, and all corners are rounded. When in use, the casing 21 includes a casing bottom surface 21d that faces the cradle 30, and a casing side surface that stands upright around the casing bottom surface 21d toward the reuse section 20a side (upper side in the third direction Z). It has a section 21e. A space surrounded by the bottom surface 21d of the case and the side surface 21e of the case forms a storage section 21a. The storage portion 21a accommodates a reservoir 22, a battery 23a, etc., which will be described later. The storage portion 21a is a concave portion with a large opening on the main surface side of the flat box-shaped housing 21. That is, the storage section 21a is open toward the reuse section 20a. In such a housing 21, the opening of the storage section 21a is closed by the lid 11 of the reuse section 20a. At one corner of the bottom surface of the flat box-shaped housing 21, a back storage portion 21b is provided, which is formed by recessing a portion of the bottom surface upward in the third direction Z. The volume of the storage section 21a is larger than the volume of the back storage section 21b. Further, the bottom surface 26 of the back storage portion 21b is convex toward the main surface within the housing 21. More specifically, the bottom surface 26 of the back storage section 21b is recessed from the housing bottom surface 21d toward the opening side of the storage section 21a according to at least the height of the wall section 25. A fitting portion 21c exposed on the side of the back storage portion 21b is formed in the wall portion 25 that separates the storage portion 21a and the back storage portion 21b. Further, the back storage portion 21b accommodates an administration port 40 installed in a cradle 30, which will be described later.

The fitting portion 21c is provided on the wall portion 25. The fitting part 21c has a substantially cylindrical cylindrical hole 28 that projects from the wall part 25 toward the back storage part 21b, and a connecting needle tube 22b. The connecting needle tube 22b is fluidly connected to the liquid feeding tube 22a, and is exposed to the rear side housing portion 21b at approximately the center of the cylindrical hole 28 in the axial direction. The connecting needle tube 22b is the tip of the liquid feeding tube 22a extending from the reservoir 22, and may be formed integrally with the liquid feeding tube 22a. The central axis of the cylindrical hole 28 is substantially parallel to the bottom surface of the storage portion 21a or the bottom surface 21d of the housing. The cylindrical hole 28 protects the connecting needle tube 22b by protruding from the wall portion 25 so as to surround the connecting needle tube 22b. The connecting needle tube 22b protrudes from the wall portion 25 in the cylindrical hole 28 toward the second end side in the first direction X.

-Reservoir 22-
The reservoir 22 has a syringe shape that includes an outer cylinder in which a medicinal solution to be administered to a patient is stored, and a pusher equipped with a gasket that is fitted into the outer cylinder. The reservoir 22 is housed in the housing section 21a of the housing 21. A discharge port for the chemical solution is provided at the tip of the outer cylinder of the reservoir 22, and a liquid supply pipe 22a is connected through the discharge port. Note that the reservoir 22 is not limited to the syringe shape, and can adopt various shapes such as a soft bag.

FIG. 4 is a perspective view of the device main body 20 in the liquid drug administration device of the first embodiment, in which the device main body 20 in which the reusable part 20a and the disposable part 20b are combined is viewed from the back storage part 21b side of the disposable part 20b. This is a view. As shown in this figure, the tip of the liquid feeding tube 22a is located approximately at the center of the fitting portion 21c (cylindrical hole 28) formed in the casing 21 of the disposable portion 20b of the device main body 20, toward the rear storage portion 21b. It has been pulled out. The cylindrical hole 28 and the connecting needle tube 22b protrude toward the second end side in the first direction X where the device main body 20 is attached to the cradle 30.

Returning to FIGS. 1 to 3, a gear is provided at the end of the pusher of the reservoir 22, and when the reusable part 20a and the disposable part 20b are combined, the gear provided at the end of the pusher is , is fitted with the gear of the liquid feeding drive section 13 that constitutes the reuse section 20a. As a result, the pusher of the reservoir 22 is pushed into the outer cylinder by the drive of the liquid feeding drive unit 13, and the chemical liquid is discharged from the tip of the liquid feeding pipe 22a (connecting needle tube 22b) through the discharge port of the outer cylinder. It has become.

-Battery box 23-
The battery box 23 houses a battery 23a that serves as a power source for the liquid feeding drive section 13 and other components that constitute the reuse section 20a, and is fixed to the storage section 21a of the housing 21. This battery box 23 is provided with an electrode for connecting the battery 23a housed inside to a power supply section provided on the circuit board 12 of the reuse section 20a. Note that the battery box 23 and the battery 23a may be provided as constituent elements of the reuse section 20a.

[Cradle 30]
The cradle 30 has an adhesive part 32, a mounting surface part 31a, and a side wall part 31b, and an administration port 40, which will be described later, is attached thereto. The cradle 30 is used by being adhered to the skin. The cradle 30 holds the administration port 40, and the apparatus main body 20 in which the reusable part 20a and the disposable part 20b described above are combined is attached. The device main body 20 is attached to the cradle 30 by sliding the device main body 20 on the cradle 30 toward the second end side in the first direction X with respect to the cradle 30 adhered onto the skin surface. Such a cradle 30 includes a mounting surface portion 31a, a side wall portion 31b, and an adhesive portion 32.

-Adhesive part 32-
The adhesive section 32 is a soft sheet member provided on the surface of the mounting surface section 31a opposite to the side on which the device main body 20 is attached, and has adhesiveness to the skin. The adhesive portion 32 is provided in a wide range of the placement surface portion 31a on the back surface (skin side surface) of the placement surface portion 31a, avoiding a through hole 31d from which a cannula portion 41 of an administration port 40, which will be described later, protrudes. There is.

-Placement surface part 31a, side wall part 31b-
The cradle 30 is configured to be able to support the device main body 20. The cradle 30 has a substantially flat mounting surface portion 31a and a side wall portion 31b. The mounting surface portion 31a is formed into a substantially rectangular shape with curved corners when viewed from above. When the device main body 20 is mounted on the cradle 30, the casing 21 of the device main body 20 is placed on the mounting surface portion 31a.

Side wall portions 31b are formed on at least three sides of the placement surface portion 31a, which is substantially rectangular when viewed from above, and stand approximately perpendicularly to the placement surface portion 31a. For this reason, a plurality of side walls are erected from the placement surface portion 31a in a direction opposite to the skin. The side of the mounting surface portion 31a on the first end side in the first direction X does not have a side wall portion that continues substantially perpendicularly to the mounting surface portion 31a. That is, in this position, the mounting surface portion 31a is open.

FIG. 5 is a perspective view for explaining how the device main body 20 is attached to the cradle 30 in the drug solution administration device 1 of the first embodiment. As shown in this figure, when mounting the device body 20 on the cradle 30, the device is moved from the side that does not have the side wall portion 31b to the second end side in the first direction X with respect to the mounting surface portion 31a. Slide the main body 20.

Further, as shown in FIGS. 1, 2, and 5, the mounting surface portion 31a includes a holding portion 31c for holding the administration port 40. The holding portion 31c is provided in a region on the second end side in the first direction X when viewed from above of the mounting surface portion 31a. The holding portion 31c is a plurality of ribs that stand up from the mounting surface portion 31a around a through hole 31d, which will be described later. When the cannula section 41 is punctured and inserted into the skin using a puncturing device (not shown), the cannula section 41 and the administration port 40 are held in the cradle 30 by fitting the administration port 40 into the holding section 31c.

The mounting surface portion 31a has a through hole 31d. The cannula portion 41 is punctured and inserted into the skin through the through hole 31d. A rib is provided around the through hole 31d and stands in a direction opposite to the skin, and the rib supports the lower surface of the administration port 40.

FIG. 6 is a cross-sectional view (Part 1) of the essential parts of the liquid drug administration device of the first embodiment, showing the administration port 40 immediately before the device main body 20 is mounted on the cradle 30 holding the administration port 40. It is a sectional view of the vicinity. FIG. 7 is a cross-sectional view (part 2) of the main parts of the liquid drug administration device of the first embodiment, showing the administration port in a state where the device main body 20 is attached to the cradle 30 holding the administration port 40. 40 is a cross-sectional view of the vicinity.

[Administration port 40]
The drug solution supplied from the reservoir 22 of the device main body 20 is administered to the patient through the administration port 40. The administration port 40 holds a cannula portion 41 that is punctured into the patient's skin, and is held by the holding portion 31c of the placement surface portion 31a of the cradle 30. Such an administration port 40 includes a substantially cylindrical cannula report 42, a lid member 43 and a seal member 44 located on the top surface of the cannula report 42, a connection port 45 connected to the device main body 20, and a connection port 45 of the connection port 45. A cap 46 is provided to seal the end surface. Further, the administration port 40 is provided with a detected portion 51 that constitutes a connection detection device 50 that will be described later.

-Cannula part 41-
The cannula portion 41 is a tubular member for introducing a medicinal solution such as insulin into the living body when the cannula portion 41 is punctured into the living body. The cannula portion 41 is made of, for example, a resin material. As the resin material forming the cannula portion 41, for example, polyurethane, nylon, ethylene-tetrafluoroethylene copolymer (ETFE), etc. can be used. The cannula portion 41 and the inner needle 400 are inserted into the living body using a puncturing device (not shown). After the cannula portion 41 is inserted into the living body, the puncture device is removed from the cradle 30 and discarded.

-Kanu Report 42-
The cannula report 42 has a substantially cylindrical main body portion and holds the cannula portion 41 . The cannula portion 41 is held on the lower surface of the cannula report hollow portion 42a. The proximal end portion of the cannula portion 41 is formed into a funnel shape that expands upward in the third direction Z when viewed from the side of the liquid drug administration device 1, and is fixed to a fixed portion within the cannula report hollow portion 42a. ing. When the administration port 40 is held in the cradle 30, the distal end of the cannula portion 41 (i.e., the tip of the cannula) projects through the lower surface of the cannula report 42 and beyond the lower surface of the cradle 30 through the through hole 31d. . The top surface of the cannula report 42 is liquid-tightly sealed by a lid member 43 and a seal member 44 inside thereof. When the liquid drug administration device 1 is in use, the top surface of the cannula report 42 faces the bottom surface 26 .

-Lid member 43-
The lid member 43 seals the top opening of the cannula report 42 together with the seal member 44 . The lid member 43 has a through hole 43 a coaxially with the axial direction of the cannula portion 41 . The inner needle 400 can be inserted into the cannula report 42 having the through hole 43a and the cannula part 41 (see FIG. 6).

-Seal member 44-
The sealing member 44 is configured so that the inner needle 400 can be inserted into the cannula portion 41, and prevents the medicinal solution from leaking from inside the cannula portion 41 after the inner needle 400 is removed from the through hole 43a of the lid member 43. prevent it from coming out. Examples of the material for the seal member 44 include rubber.

-Connection port 45-
The connection port 45 includes a connection port body 49 that extends from the side circumference of the cannula report 42 and has a space continuous with the cannula report hollow 42a, and an opening that forms one end of the connection port body 49. 47, and a cap 46 for liquid-tightly sealing the opening 47. When the liquid drug administration device 1 is in use, the first end side of the connection port main body portion 49 in the first direction X becomes a fitting end portion 48 that fits into the fitting portion 21c. The end surface of the fitting end portion 48 is covered with a cap 46 . That is, the opening 47 is closed with the cap 46. The connection port 45 and the cannula report 42 are in communication through the second end side opening of the connection port 45 in the first direction X. In this embodiment, the connection port 45 has a substantially cylindrical shape with a hollow portion. The first end side of the connection port 45 in the first direction X has an opening 47 . When the device main body 20 is mounted on the cradle 30, the opening 47 of the connection port 45 is fitted into the fitting portion 21c. Thereby, the device main body 20 and the cradle 30 are connected, and the medicinal solution sent from the device main body 20 is delivered to the cannula part 41 through the connection port 45 and the cannula report 42.

-Cap 46-
The cap 46 liquid-tightly seals the opening of the connection port 45. The cap 46 is a substantially cylindrical member having a cap end surface 46b on one end side and an opening on the other end side with the cap circumferential surface 46a in between. The cap 46 is attached from the end surface of the opening 47 toward the second end in the first direction X so as to cover the outer periphery and end surface of the opening 47 . More specifically, the cap circumferential surface 46a engages with an engagement groove provided on the outer periphery of the connection port 45 (or opening 47). This also functions as a sealing member between the connection port 45 and the fitting portion 21c when the connection port 45 is inserted into the fitting portion 21c. The cap end surface 46b may have a planar shape, but a rib may be provided along the opening shape of the connection port 45 to improve sealing performance. When the device main body 20 is mounted on the cradle 30, the connecting needle tube 22b passes through the cap end surface 46b. Thereby, a liquid feeding path is formed in which the liquid feeding pipe 22a, the connection port 45, the cannula report 42, and the cannula section 41 communicate with each other.

Such a cap 46 is preferably formed of a material having the following characteristics (i) to (iii). (i) The distal end of the connecting needle tube 22b can be inserted from the outside of the connecting port 45. (ii) It is possible to maintain liquid tightness between the tip of the inserted connecting needle tube 22b and the connecting port 45. (iii) The hole formed in the cap 46 by inserting the connecting needle tube 22b is closed after the connecting needle tube 22b is removed. Examples of materials having the above characteristics (i) to (iii) include rubber.

[Connection detection device 50]
FIG. 8 is an enlarged cross-sectional view (part 1) illustrating the connection detection device 50 provided in the liquid medicine administration device 1 of the first embodiment, and shows the axial direction (i.e., , a sectional view taken along a first direction X). FIG. 9 is an enlarged sectional view (part 2) illustrating the connection detection device 50 provided in the liquid drug administration device 1 of the first embodiment, and shows the axial direction of the cylindrical connection port 45 in the administration port 40. FIG. 3 is a cross-sectional view of a normal plane (that is, along the second direction Y). Both FIGS. 8 and 9 are views of the device main body 20 mounted on the cradle 30 holding the administration port 40. The configuration of the connection detection device 50 will be described below based on FIGS. 8 and 9 and FIGS. 6 and 7 above.

In the connection detection device 50 shown in these figures, when the device body 20 is attached to the cradle 30 in which the administration port 40 is installed, the connection port 45 of the administration port 40 is connected to the fitting portion 21c of the device body 20. This is a device for detecting insertion. Such a connection detection device 50 includes a detected portion 51 provided in the administration port 40 and a sensor 52 as a detection portion provided in the device main body 20.

-Detected part 51-
The detected portion 51 is disposed at a location where the device main body 20 and the administration port 40 approach or come into contact with each other when the liquid drug administration device 1 is in use. The detected portion 51 is provided in the administration port 40 . More specifically, the detected portion 51 is arranged in a region of the connection port 45 on the first end side in the first direction X. The detected portion 51 is arranged at the opening 47 of the connection port 45 in the administration port 40 . Alternatively, the detected portion 51 is arranged around the outer periphery of the opening 47 . In these cases, it is preferable to provide the detected portion 51 on the cap 46 . In this case, the detected portion 51 can be formed by disposing resin containing a magnetic member on the cap circumferential surface 46a. More specifically, when manufacturing the cap 46, a layered magnetic portion 51a is molded over the entire circumference of the cap circumferential surface 46a. As a result, the detected portion 51 can cover the outer circumferential surface of the opening 47, so that detection can be performed regardless of the direction in which the cap 46 is attached. As such magnetic materials, magnetic powders such as iron, cobalt, nickel, and ferrite can be used. As the material for the cap 46, various rubber materials and additives such as vulcanizing agents can be used as appropriate.

-Sensor 52-
The sensor 52 is provided as a detection section for detecting the fitting of the connection port 45 into the fitting section 21c, and is set according to the type of the detected section 51. When the detected portion 51 is a magnetic portion 51a, the sensor 52 only needs to be able to detect the magnitude of the magnetic field (magnetic field), and may be a magnetic sensor 52a that can further measure the direction of the magnetic field. Such a magnetic sensor 52a may be, for example, a magnetoresistive element or a Hall element. The magnetic sensor 52a is attached at a position where it can detect the magnetic force of the magnetic part 51a provided in the administration port 40 when the device main body 20 is normally attached to the cradle 30 in which the administration port 40 is installed. .

Such a magnetic sensor 52a is arranged, for example, in a state where it hangs down from the reusable part 20a of the apparatus main body 20 toward the peripheral wall of the fitting part 21c in the disposable part 20b. In the detectable state, the detection part of the magnetic sensor 52a is arranged in the storage part 21a, and the detected part 51 is arranged in the back storage part 21b. The detection part of the magnetic sensor 52a is arranged in at least a part of the area along the circumferential surface of the cylindrical hole 28 in the storage part 21a. This makes it possible to detect the connection based on the position of the reusable part 20a that constitutes the device main body 20, thereby improving positioning accuracy.

When the device main body 20 and the cradle 30 are connected in the correct position, the magnetic sensor 52a faces the magnetic part 51a with the bottom surface of the optical housing 21 in between. It is preferable that a plurality of such magnetic sensors 52a be provided so as to face the magnetic portion 51a. In this case, it is preferable that the magnetic portions 51a be arranged so as to surround the central axis around the opening 47, and that each magnetic sensor 52a and the magnetic portions 51a be in the same facing state. As a result, the strength of the magnetic force detected by each magnetic sensor 52a becomes uniform, so that it can be detected that the axis surrounded by the magnetic part 51a and the central axis of the substantially cylindrical connection port 45 are substantially parallel. .

[Remote controller 60]
The remote controller 60 operates the drive of the device main body 20. The remote controller 60 includes a display section 61, an operation section 62, a controller output section 63, a controller communication section 64, and a controller calculation section 65 that controls these. The remote controller 60 having these may be a portable terminal such as a smartphone with a dedicated program installed therein. Details of each component are as follows.

-Display section 61-
The display section 61 displays various settings related to driving the device main body 20, input contents through the operation section 62, which will be described next, and administration history in the device main body 20.

-Operation unit 62-
The operation unit 62 is a user interface part through which the user inputs settings for insulin administration by the device main body 20, execution or stop of control of the device main body 20, selection of display contents on the display unit 61, and the like. Such an operation unit 62 may be, for example, a keypad or a touch panel provided on the display surface of the display unit 61. When the operation unit 62 is a touch panel, the display unit 61 displays selection buttons, a numeric keypad, etc. for the touch panel.

-Controller output section 63-
The controller output section 63 outputs an alarm W according to instructions from the controller calculation section 65, which will be described later. The controller output section 63 is adapted to emit, for example, vibration, sound, light emission, etc. alone or in combination as the alarm W.

-Controller communication section 64-
The controller communication unit 64 is a part that communicates with the paired device main body 20. This controller communication section 64 is composed of a transmitting section and a receiving section. The controller communication section 64 is a section that performs wireless communication with the main body communication section 15 on the device main body 20 side, and the same standardized wireless communication technology as the main body communication section 15 is applied.

-Controller calculation section 65-
The controller calculation unit 65 causes the display unit 61 to display various settings input through the operation unit 62, transmits the various settings from the controller communication unit 64 to the device main body 20, and sends an alarm to the controller output unit 63. Output W.

The controller calculation unit 65 as described above includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory), which are not shown here. The above-mentioned input, display, communication, and output are performed by such a controller calculation unit 65.

<Procedure for using drug solution administration device 1>
Next, a procedure for using the drug solution administration device 1 having the configuration described above will be explained. First, the user of the drug solution administration device 1 assembles the device main body 20 by combining the reuse section 20a and the disposable section 20b in which the reservoir 22 is filled with the drug solution, before administering the drug solution by the drug solution administration device 1. As a result, power from the battery 23a disposed in the disposable section 20b is supplied to the power supply section provided on the circuit board 12 of the reuse section 20a, and the main body calculation section 16 provided on the reuse section 20a is activated. In this state, the main body calculation unit 16 executes a predetermined program and waits for a priming command from the user.

Next, the user of the drug solution administration device 1 pushes out the drug solution filled in the reservoir 22 so as to fill the inside of the liquid feeding tube 22a pulled out from the outer cylinder of the reservoir 22 by operating the operation unit 62 of the remote controller 60. Priming is performed to discharge air from the tip of the connecting needle tube 22b. Note that by preparing the disposable part 20b in which the liquid sending pipe 22a pulled out from the reservoir 22 is filled with a chemical solution in advance, priming does not need to be performed when the reusable part 20a and the disposable part 20b are combined. .

Also, referring to FIG. 6, the user of the liquid drug administration device 1 installs the administration port 40 on the cradle 30. At this time, the user first adheres the cradle 30 to the skin using the adhesive part 32. Next, using a dedicated jig such as a puncturing device (not shown), the administration port 40 is installed in the holding portion 31c of the cradle 30 in a predetermined state. As a result, the cannula section 41 of the administration port 40 and the inner needle 400 within the cannula section 41 are brought into a state in which they are punctured and inserted into the user's skin. Thereafter, by removing the dedicated jig from the administration port 40, the inner needle 400 is removed from the inside of the cannula section 41, and the cannula section 41 is placed subcutaneously.

Next, referring to FIG. 5, the primed device main body 20 is mounted on the cradle 30 in which the administration port 40 is installed. Thereafter, the user operates the remote controller 60 and performs an input to start administering the drug solution. In response to an input to start administering a medicinal solution, a program for a method of controlling a medicinal solution administration device, which will be described later, is executed.

<Control method of drug solution administration device 1>
FIG. 10 is a flowchart for explaining a method of controlling the liquid drug administration device 1 according to the first embodiment. The control method for the liquid drug administration device 1 explained using this figure is such that the CPU of each device constituting the main body calculation unit 16 of the liquid drug administration device 1 explained using FIG. This is achieved by executing. Hereinafter, a method of controlling the liquid drug administration device 1 will be described in the order shown in the flowchart of FIG. 10, with reference to FIG. 3 and the necessary figures.

[Step S101]
In step S101, the main body calculation unit 16 determines whether the main body communication unit 15 has received an instruction to start administering the drug solution. The instruction to start administering the drug solution is an instruction based on the user's input from the operation unit 62 of the remote controller 60, and information about the instruction to start administration input from the operation unit 62 is transmitted from the controller communication unit 64 to the main body communication 15. The main body calculation unit 16 waits until the main body communication unit 15 determines that the instruction to start administration has been received (YES), and when it is determined that the instruction to start administration has been received (YES), the main body calculation unit 16 proceeds to the next step S102. move on.

[Step S102]
In step S102, the main body calculation unit 16 refers to the signal from the sensor 52, and the connecting port 45 of the administration port 40 is fitted into the fitting part 21c of the device main body 20, and the connecting needle tube 22b and the cannula part 41 are properly connected. Determine whether or not it is connected to. At this time, the main body calculation unit 16 determines that the connection is normal (YES) if the signal strength from the sensor 52 exceeds a preset threshold or is equal to or greater than the threshold. On the other hand, if the signal strength from the sensor 52 is below or does not exceed a preset threshold, the main body calculation unit 16 determines that the connection is not normal (NO).

Note that when the device main body 20 is provided with a plurality of sensors 52, the threshold values set for each sensor 52 do not need to be the same value. In this case, in a state in which the connection port 45 of the administration port 40 is properly fitted into the fitting part 21c of the housing 21 of the disposable part 20b of the device main body 20, the signal strength detected by each sensor 52 is determined by experiment in advance. It is assumed that the information has been obtained. It is assumed that a threshold value for the signal strength detected by each sensor 52 is set based on the acquired value. Here, a state in which the connection port 45 is properly fitted into the fitting part 21c means a state in which the cylindrical connection port 45 is fitted into the substantially cylindrical fitting part 21c, and each central axis is Assume that they are in a substantially parallel state.

In this case, the main body calculation unit 16 determines that the connection is normal (YES) when all of the signal intensities from each sensor 52 exceed or are equal to or greater than a preset threshold for each sensor. Otherwise, it is determined that the connection is not normal (NO).

If it is determined that the connection is normal (YES), the process proceeds to step S103, and if it is determined that the connection is not normal (NO), the process proceeds to step S104.

[Step S103]
In step S103, the main body calculation unit 16 starts a liquid feeding process for discharging the medicinal liquid from the reservoir 22 by driving the liquid feeding drive unit 13, and ends the series of processes.

[Step S104]
On the other hand, in step S104, the main body calculation section 16 instructs the main body output section 14 to output an alarm. As a result, the main body output section 14 outputs an alarm, notifying the user of the liquid drug administration device 1 that the cannula section 41 and the connecting needle tube 22b are not properly connected, and the administration port 40 is installed. Prompts the device body 20 to be reattached to the cradle 30.

Further, the main body calculation unit 16 instructs the main body communication unit 15 to transmit a connection failure. As a result, the main body communication section 15 sends a notification of the connection failure to the controller communication section 64. The controller calculation unit 65 instructs the controller output unit 63 to output an alarm when the controller communication unit 64 receives the notification of the poor connection. As a result, the controller output section 63 outputs an alarm and notifies the user of the liquid drug administration device 1 that the cannula section 41 and the connecting needle tube 22b are not properly connected, so that the administration port 40 can be installed. This prompts the user to reattach the cradle 30 to the device main body 20. After that, the series of processing is terminated. Here, if the user needs to reconnect the device main body 20 and the cradle 30 with the administration port 40, the sensor 52 detects that the signal from the detected part 51 is turned off. Then, the process may be returned to step S102. Alternatively, the connection state between the fitting portion 21c and the connection port 45 may be constantly monitored by the sensor 52 after the liquid feeding process is started in step S103, that is, throughout the liquid feeding process.

<Effects of the first embodiment>
The drug solution administration device 1 of the first embodiment described above includes the magnetic portion 51a that surrounds the connection port 45 in the administration port 40, and is located at a position opposite to the fitting portion 21c into which the connection port 45 is fitted in the device main body 20. In this configuration, a magnetic sensor 52a is provided. Therefore, the fitting state of the connection port 45 into the fitting portion 21c can be directly detected based on the signal intensity from the magnetic sensor 52a. Moreover, thereby, it is possible to detect the connection between the connecting needle tube 22b held by the fitting part 21c and the connecting port 45. Further, by providing a plurality of magnetic sensors 52a, it is possible to detect whether or not the connection port 45 is fitted in parallel to the fitting portion 21c.

As a result, when the device main body 20 is mounted on the cradle 30, a poor connection between the cannula section 41 held in the administration port 40 and the fitting section 21c is detected, and the user of the liquid drug administration device 1 is prompted to install the device. It is possible to encourage correction. Moreover, in this way, in the liquid medicine administration device 1, it is possible to prevent the liquid medicine from leaking from the connecting portion between the device main body 20 and the administration port 40, and to perform highly accurate liquid medicine administration.

≪Second embodiment≫
<Configuration of drug solution administration device>
FIG. 11 is a cross-sectional view (part 1) of a main part of the liquid medicine administration device 2 of the second embodiment. Further, FIG. 12 is a cross-sectional view (part 2) of the essential parts of the liquid medicine administration device 2 of the second embodiment. Furthermore, FIG. 13 is a block diagram of the drug solution administration device 2 of the second embodiment. The liquid medicine administration device 2 of the second embodiment shown in these figures differs from the liquid medicine administration device 1 of the first embodiment in the configuration of the connection detection device 70, and other components are the same. Therefore, only the configuration of the connection detection device 70 will be described here.

[Connection detection device 70]
The connection detection device 70 is a device for detecting that the connection port 45 is fitted into the fitting portion 21c when the device main body 20 is mounted on the cradle 30 in which the administration port 40 is installed. Such a connection detection device 70 includes a switch pressing member 71 provided in the administration port 40, a microswitch 72 as a detection portion provided in the device main body 20, and an intermediate device provided in the disposable portion 20b of the device main body 20. It is composed of a member 73 and a protruding member 74. Note that the drug solution administration device 2 may be provided with a plurality of these members. Each configuration will be explained below.

-Switch pressing member 71-
The switch pressing member 71 is for pressing a microswitch 72, which will be described next. Such a switch pressing member 71 is provided on the first end surface of the connection port 45 in the administration port 40 in the first direction X. Here, as an example, it is assumed that the switch pressing member 71 is provided so as to be held by the cap 46 at a position where the open end of the connection port 45 is extended. More specifically, the switch pressing member 71 is a convex portion 71a provided on the cap end surface 46b. The convex portion 71a is preferably provided in the first direction X such that at least a portion of the convex portion 71a overlaps with a position where the opening edge of the opening 47 is extended. It is preferable that the convex portion 71a be provided in the upper region of the opening edge of the opening portion 47 in the third direction Z. This makes it easier to arrange a microswitch 72, which will be described later, and extends from the reuse section 20a. Since connection detection can be performed based on the position of the reused portion 20a that constitutes the device main body 20, positioning accuracy can be improved. Preferably, the convex portion 71a is formed from a harder material than the cap 46. It is important that the switch pressing member 71 does not interfere with the sealing state of the connection port 45 by the cap 46 or the fitting of the connection port 45 into the fitting portion 21c. Further, the switch pressing member 71 may be formed by partially deforming the cap 46, or may be molded simultaneously with the cap 46. Alternatively, the switch pressing member 71 may be separate from the cap 46.

When the drug solution administration device 2 has a plurality of switch pressing members 71, each switch pressing member 71 is provided at each position extending from the open end of the connection port 45. Each switch pressing member 71 is preferably provided at a position apart from each other, and is arranged symmetrically with respect to the center of the cap end surface 46b or the opening end surface of the connection port 45.

-Micro switch 72-
The microswitch 72 is provided as a detection section for detecting fitting of the connection port 45 into the fitting section 21c. This microswitch 72 is placed in a position where it is pressed directly or indirectly by the switch pressing member 71 when the device main body 20 is slid and attached to the cradle 30 in which the administration port 40 is installed. . At this time, a detection relay part A is provided on the bottom surface 28a of the cylindrical hole 28 of the fitting part 21c at a position facing the switch pressing member 71 described above.

The microswitch 72 is disposed, for example, in a state where it hangs down from the reuse section 20a of the device main body 20 toward the disposable section 20b. When the liquid drug administration device 2 is in use, the microswitch 72 is placed in the storage section 21a via the detection relay section A, and the switch pressing member 71 is placed in the back storage section 21b. The microswitch 72 detects the fitting of the connection port 45 into the fitting part 21c by detecting a response from the detection relay part A. If a plurality of switch pressing members 71 are provided, a microswitch 72 is provided at a position corresponding to each switch pressing member 71. In this case, in a state in which the connection port 45 is properly fitted into the fitting part 21c, that is, in a state in which the substantially cylindrical connection port 45 is fitted into the fitting part 21c, the respective central axes are substantially parallel. It is assumed that a plurality of microswitches are arranged so that each switch pressing member 71 presses each corresponding microswitch 72. This makes it possible to detect the connection based on the position of the reusable part 20a that constitutes the device main body 20, thereby improving positioning accuracy.

Further, the microswitch 72 is connected to the main body calculation section 16. Furthermore, the microswitch 72 is pressed directly or indirectly by the switch pressing member 71 of the administration port 40 when the device main body 20 is slid and attached to the cradle 30 in which the administration port 40 is installed. It turns on. Note that the microswitch 72 may be provided in the reuse section 20a if it is turned on in such a case.

-Detection relay section A-
The detection relay section A directly or indirectly transmits the input from the pressing member 71 to the microswitch 72 between the disposable member (the cradle 30 connected to the administration port 40, the disposable section 20b) and the reusable section 20a. At a position facing the microswitch 72, it is provided at at least one location on the bottom surface of the fitting portion 21c in the disposable portion 20b of the device main body 20. The detection relay section A is provided depending on the number and position of the pressing members 71 and/or the microswitches 72. The detection relay section A may be an opening provided on the disposable section 20b, but it is preferable that the opening is fluid-tightly closed by a flexible intermediate member 73. The intermediate member 73 may be membrane-like or plug-like. When the device main body 20 is slid and attached to the cradle 30 in which the administration port 40 is installed, the intermediate member 73 is pressed by the switch pressing member 71 described above and protrudes toward the microswitch 72 side. Such intermediate member 73 is formed of, for example, a rubber member.

-Protruding member 74-
In addition to the intermediate member 73, the detection relay section A may further include a protruding member 74. The protruding member 74 is provided on the surface of the intermediate member 73 facing the microswitch 72 side, and is used when the device main body 20 is slid and attached to the cradle 30 in which the administration port 40 is installed. Press switch 72 directly. The protruding member 74 is selected from those that can reliably transmit the input from the switch pressing member 71, depending on the detection method of the microswitch 72. In order to easily transmit the stress from the switch pressing member 71 to the microswitch 72, the protruding member 74 may be made of a harder material than the intermediate member 73. Alternatively, the protruding member 74 and the microswitch 72 may be formed as contact sensors using a known detection method.

<Procedure for using the drug solution administration device 2 and control method of the drug solution administration device 2>
The procedure when using the drug solution administration device 2 having the configuration described above is carried out in the same manner as the procedure when using the drug solution administration device 1 of the first embodiment. Therefore, the explanation here will be omitted.

<Control method of drug solution administration device 2>
The method of controlling the liquid drug administration device 2 according to the second embodiment is carried out in the same manner as the method of controlling the liquid drug administration device 1 of the first embodiment. However, the determination as to whether or not the liquid feeding pipe 22a and the cannula section 41 are normally connected, which is carried out in step S102 described using the flowchart of FIG. 10, is performed as follows. In other words, the main body calculation unit 16 determines that the connection is normal (YES) when the microswitch 72 is turned on, and determines that the connection is not normal (NO) when the microswitch 72 is not turned on. to decide.

In addition, when a plurality of microswitches 72 are provided in the administration port 40, the main body calculation unit 16 determines that the connection is normal (YES) when all the microswitches 72 of each connection detection device 70 are turned on. Otherwise, it is determined that the connection is not normal (NO).

<Effects of the second embodiment>
In the drug solution administration device 2 of the second embodiment described above, the switch pressing member 71 is provided at the tip of the connection port 45 in the administration port 40, and the switch pressing member 71 is provided at a position in the device main body 20 facing the fitting portion 21c into which the connection port 45 is fitted. It has a configuration in which a microswitch 72 is provided at the top. Therefore, the fitting state of the connection port 45 into the fitting portion 21c can be directly detected by turning on/off the microswitch 72. Further, thereby, it is possible to detect the connection between the connecting needle tube 22b held by the fitting part 21c and the cannula part 41 communicating with the connecting port 45. Furthermore, by providing a plurality of sets of switch pressing members 71 and microswitches 72, it is possible to detect whether or not the connection port 45 is fitted in parallel to the fitting portion 21c.

As a result, similarly to the first embodiment, when the device main body 20 is mounted on the cradle 30 in which the administration port 40 is installed, the cannula part 41 held in the administration port 40 and the connection extending from the reservoir 22 It is possible to detect a poor connection with the needle tube 22b and prompt the user of the liquid drug administration device 2 to reinstall it. That is, the connection between the fitting end portion 48 and the connecting needle tube 22b can be detected near the connecting portion. Thereby, in the liquid drug administration device 2, it is possible to prevent liquid medicine from leaking from the connecting portion between the device main body 20 and the administration port 40, and to perform highly accurate drug liquid administration.

DESCRIPTION OF SYMBOLS 1, 2...Medicinal solution administration device 14...Main body output part 15...Main body communication part 16...Main body calculation part 20...Device main body 21c...Fitting part 22...Reservoir 22a...Liquid feeding tube 22b...Connecting needle tube 30...Cradle 40...Administration port 41... Cannula part 45... Connection port 50, 70... Connection detection device 51a... Magnetic member 52a... Magnetic sensor (detection part)
60...Remote controller 63...Controller output section 64...Controller communication section 71...Switch pressing member 72...Micro switch (detection section)

Claims (14)

A reservoir filled with a medicinal solution, a liquid feeding pipe extending from the reservoir, and a calculation unit that controls discharge of the chemical liquid from the reservoir are housed in a housing, and the tip of the liquid feeding pipe is housed in a housing. a device main body further having a fitting portion exposed to the outside of the body;
a cradle that holds a cannula portion that is punctured and inserted subcutaneously; and a connection port having a fitting end portion that connects to the fitting portion;
a connection detection device that detects a connection between the fitting part and the connection port,
The calculation unit controls discharge of the chemical solution from the reservoir based on a signal from the connection detection device,
The connection detection device includes:
comprising a detected part provided at the fitting end of the connection port, and a sensor serving as a detection part provided in a peripheral area of the fitting part or in either the fitting part,
The detected part is provided at a position to be fitted with the fitting part.
A liquid drug administration device characterized by: The calculation unit discharges the chemical solution from the reservoir when determining that the connection port has fitted into the fitting portion based on a signal from the detection unit of the connection detection device. drug administration device. The fitting end of the connection port is closed with a cap through which the liquid feeding pipe can pass,
The liquid medicine administration device according to claim 1 or 2 , wherein the detected portion is provided in the cap. The liquid drug administration device according to any one of claims 1 to 3 , wherein the detected portion is a magnetic material, and the sensor is a magnetic sensor. The liquid drug administration device according to claim 4 , wherein the calculation unit determines that the connection port has fitted into the fitting portion when the signal from the sensor reaches a preset threshold. The connection detection device includes a plurality of the magnetic sensors,
The calculation unit determines that the connection port is fitted into the fitting portion when signals from the plurality of magnetic sensors reach preset thresholds.
The liquid drug administration device according to claim 4 or 5. The magnetic body is arranged so as to surround the central axis of the opening of the connection port,
The plurality of magnetic sensors are arranged facing the magnetic body.
The liquid drug administration device according to claim 6. The detected part is a switch pressing member,
The detection section is a microswitch that is pressed by the switch pressing member when the connection port is fitted into the fitting section.
The liquid drug administration device according to claim 1 . The liquid medicine administration device according to claim 8 , wherein the calculation unit determines that the connection port is fitted into the fitting portion when the microswitch is pressed. The connection detection device includes a plurality of the switch pressing members and a plurality of the microswitches provided corresponding to each of the switch pressing members,
The liquid drug administration device according to claim 8 or 9, wherein the calculation unit determines that the connection port is fitted into the fitting portion when all of the plurality of microswitches are pressed. comprising an output unit that outputs an alarm according to instructions from the calculation unit,
According to any one of claims 1 to 10 , wherein the calculation unit instructs the output unit to output an alarm when determining that the connection port is not fitted into the fitting part. The liquid drug administration device described above. a communication section provided in the device main body;
and a remote controller for setting control of drug solution discharge from the reservoir via the communication unit,
The remote controller includes an output section that outputs an alarm,
If the calculation unit determines that the connection port is not fitted into the fitting part, the communication unit instructs the remote controller to output an alarm from the output unit of the remote controller. Item 12. The liquid drug administration device according to any one of Items 1 to 11 . A reservoir filled with a medicinal solution, a liquid feeding pipe extending from the reservoir, and a calculation unit that controls discharge of the chemical liquid from the reservoir are housed in a housing, and the tip of the liquid feeding pipe is housed in a housing. a device main body further having a fitting portion exposed to the outside of the body;
a cradle that holds a cannula portion that is punctured and inserted subcutaneously; and a connection port having a fitting end portion that connects to the fitting portion;
A detected part provided at a position to be fitted with the fitting part at the fitting end of the connection port, and a detection part provided in either the peripheral area of the fitting part or the fitting part. a connection detection device that has a sensor and detects a connection between the fitting portion and the connection port;
Equipped with
A method for controlling a drug solution administration device, wherein the calculation unit controls discharge of the drug solution from the reservoir based on a signal from the connection detection device. The drug solution administration device according to claim 13 , wherein the drug solution is discharged from the reservoir when it is determined that the connection port is fitted into the fitting portion based on a signal from a detection section of the connection detection device. Control method.

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